package com.spider.oss;

import com.aliyun.oss.*;
import com.aliyun.oss.common.auth.CredentialsProviderFactory;
import com.aliyun.oss.common.auth.EnvironmentVariableCredentialsProvider;
import com.aliyun.oss.common.comm.SignVersion;
import com.aliyun.oss.model.*;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class Demo {
    public static void main(String[] args) throws Exception {
        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "oss-cn-beijing.aliyuncs.com";
        String bucketName = "alta-coa";
        // 替换为您的 Bucket 区域
        String region = "cn-huabei2";
        // 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // 设置最大个数。
        int maxKeys = 200;
        // 创建OSSClient实例。
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);
        OSS ossClient = OSSClientBuilder.create()
                .endpoint(endpoint)
                .credentialsProvider(credentialsProvider)
                .clientConfiguration(clientBuilderConfiguration)
                .region(region)
                .build();
        try {
            String nextContinuationToken = null;
            ListObjectsV2Result result = null;
            // 分页列举，每次传入上次返回结果中的nextContinuationToken。
            do {
                ListObjectsV2Request listObjectsV2Request = new ListObjectsV2Request(bucketName).withMaxKeys(maxKeys);
                listObjectsV2Request.setContinuationToken(nextContinuationToken);
                result = ossClient.listObjectsV2(listObjectsV2Request);
                List<OSSObjectSummary> sums = result.getObjectSummaries();
                for (OSSObjectSummary s : sums) {
                    System.out.println("\t" + s.getKey());
                }

                nextContinuationToken = result.getNextContinuationToken();

            } while (result.isTruncated());
        } catch (OSSException oe) {
            oe.printStackTrace();
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }


}
